Quality learning materials. Enjoyed the cryptography systems introduction, especially the one based on GPS coordinates.

this is good , but i think it's gonna be better by including subtitle inside a video.

Well done in American manner :)

Very Nice topic

Thanks Coursera for this course but i am not happy because in mt certificate my name is change so please help me to change my name

Very Good source for beginners and intermediate kb.

Very Good Course

Excelente curso, material metodología y material complementario!!!

It was a very educative and practically exciting course.

the course is not easy but useful for comprehension

Very good cource and very much helpful

great course , there is lots to learn

Nice but not receiving certificate

Nice i like it the notes are awsm

Very professional and very good

Nice and Informative Course.

Great Learning experience

It is very helpful for me

its really well expained

It's very helpful course

very helpful for pros.

VERY GOOD RECOMMENDED

very interesting

Good experience

Perfect Course